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1 2004 2004 SHRIMP SHRIMP Joseph L.Wooden , ,, 49 , 90 , , ,SiO_2 65.1475.66, 7.49-8.96, Na_2O K_2O ,K_2O/Na_2O 1, 1.12-2.68, 1.83-2.81 2.34,CIPW AC, 0.773.93 1.78, 1, ;, 89.4410-6335.2810-6, ,,,Eu /Eu* 0.650.490.35, 1 1000 ,, BaNbSrPTi , S ,,BaNbSrPTi ,, , SHRIMP U-P b 17 , 720. 37.3Ma1032.88.9Ma1597.814.3Ma, 445.64.5Ma497.74.1Ma, 47012Ma,206Pb/238U207Pb/235U 156136Ma, , 45917Ma,, , 47012Ma 416.1 4.6Ma471.86.1Ma, 442.16.7Ma,, 7 , 2717.42 4.2Ma,10 1905.520.2Ma,28 792.27.7Ma 7 10 ,28 , Th/U , 0.431.78, 10 28 Th /U 0.43 0.45 , 0.5,, SHRIMP
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